JP2014065319A - Dust collector for cutting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust collector capable of achieving high dust collection efficiency at a bottom face side of cutting material and having high operability by being arranged to be detachable and re-attachable from/to a cutting machine, although dust collection has been conventionally insufficient at the bottom face side of the cutting material, in the portable cutting machine where a user performs cutting processing while moving the cutting machine in a cutting traveling direction in a state that the cutting machine is ridden on the cutting material.SOLUTION: A dust collector is constituted so that a U-shaped support arm 22 is detachable and re-attachable from/to a base 2 and a box-like dust receiver 21 is supported directly below a cutting edge 5 through the support arm 22. The dust receiver 21 receives dust generated at a bottom face side of cutting material to collect the dust.

Description

  The present invention mainly relates to a dust collector for a portable cutting machine.

The portable cutting machine includes a cutting machine body provided with a circular saw blade that is rotated by an electric motor, and a base that overlaps the upper surface of the cutting material and supports the cutting machine body with respect to the cutting material. Thus, the user can hold the hand and move it on the cutting material to cut the saw blade protruding toward the lower surface of the base into the cutting material and perform the cutting work.
When cutting using this type of cutting machine, cutting powder is blown up by the rotation of the saw blade. For this reason, the upper surface side of the base of the saw blade is covered with a blade case to prevent the scattering of cutting powder, and a dust collection bag for collecting the dust that has been blown up is connected to the blade case, or a hose is connected. Through the dust collector.
On the other hand, on the lower surface side of the base, the saw blade is covered with a movable cover that can be opened and closed except for a portion cut into the cutting material. The movable cover has its tip end abutted against the cut-side end face of the cutting material, and in this abutting state, the cutting machine is moved in the cutting progress direction, so that the movable cover is gradually opened and cut at a constant distance. Fully open when advanced.
According to this movable cover, a part of the periphery of the saw blade is covered on the lower surface side of the base, so that dust cannot be collected on the upper surface side of the base, and dust blown to the lower surface side of the base by rotation of the saw blade It can be received by the movable cover to prevent scattering, and in this respect, the movable cover can have a certain dust collecting function.

JP 2002-210702 A

However, as described above, since the movable cover is gradually opened as the cutting progresses, and the exposed range of the saw blade is increased, it is difficult to provide a sufficient dust collecting function. Conventionally, as a technique for collecting dust on the base lower surface side (cut material lower surface side), for example, there has been a technique disclosed in the above-mentioned patent document. This patent document discloses a dust collection ruler in which an upper plate and a lower plate are attached to a ruler that guides a cutting machine body, and cutting is performed with a cutting material sandwiched between both plates. A plurality of ribs are provided on the upper surface of the lower plate so that a slight gap is generated between the lower surface of the cutting material and the cutting powder on the lower surface side of the cutting material is collected using this clearance. Can do. However, since this dust collection ruler was used as a device separate from the cutting machine, it was inconvenient to handle. In addition, since the cutting material is sandwiched between the upper plate and the lower plate on one side (right side or left side) with respect to the cutting blade, the cutting powder generated on the opposite side of the cutting blade can be collected. It was difficult.
The present invention has been made in view of the conventional problems, and provides an attachment-type dust collector that can be handled as an integral part of a cutting machine. An object of the present invention is to enable efficient collection of cutting powder generated on both sides of the cutting blade on the side.

For this reason, this invention was set as the dust collector of the structure described in each claim of a claim.
According to the dust collector of claim 1, since the dust receiver is supported by the base or the cutting machine body, it can be handled as an integral part of the cutting machine, thereby handling the dust collector. Can improve convenience.
Further, since the dust receiver is held below the cutting blade, it is possible to receive cutting powder generated on both sides below the cutting blade, so that dust collection is efficiently performed on both the left and right sides of the cutting blade on the lower surface side of the cutting material. Will be able to.
According to the dust collector of claim 2, since it can be removed when not necessary, the convenience of handling of the cutting machine can be further enhanced.
According to the dust collecting apparatus of the third aspect, the dust receiver can be supported with respect to the part that is closer to the cutting material, so that the support structure can be simplified.
According to the dust collector of claim 4, since the dust receiver can be supported by using the existing ruler mounting portion, the dust collector can be manufactured at a lower cost than when a special mounting site is newly set. A dust device can be realized, and retrofitting of the dust collector can be easily performed.
According to the dust collecting apparatus of the fifth aspect, it is possible to prevent the cut-off side cut off from the cutting material main body side by cutting from getting on the dust receiver. If the cut-off side of the cutting material gets on the dust catcher, it tends to stay in the vicinity of the cutting blade without leaving a sufficient distance from the cutting-material main body side (side not cut off). On the other hand, the periphery of the cutting blade protruding to the lower surface side of the base is usually covered with a movable cover that can be opened and closed in the circumferential direction. For this reason, when the cut-off side of the cut material gets on the dust receiver after the cutting process, the movable cover that is in the fully open state during the cutting process interferes with the cut-off side and the closing operation is hindered.
However, according to the dust collecting device of the fifth aspect, the dust receiver tilts downward due to the weight of the cut-off side of the cutting material. For this reason, the movable cover does not interfere with the cut-off side, and as a result, the movable cover is closed smoothly.
According to the dust collecting apparatus of the sixth aspect, by connecting, for example, a dust collector to the dust receiver via the dust collecting hose connected to the dust collecting nozzle, the dust collected in the dust receiver is collected by the dust collector ( Recovery).
The dust receiver is supported so as to be tiltable up and down with respect to the dust collection nozzle. For this reason, the dust receiver can be smoothly tilted up and down without twisting the dust collecting hose, so that the cut-off side of the cutting material does not interfere with the closing operation of the movable cover, so that the movable cover malfunctions. Can be prevented in advance.
According to the cutting machine according to claim 7, the above-described effects can be obtained for the dust collector for collecting dust on the lower surface side, thereby further increasing the added value of the cutting machine, such as the dust collection function and handleability. Can do.
According to the cutting machine of the eighth aspect, the cutting powder generated on both the upper surface side and the lower surface side of the cutting material can be collected, so that the cutting operation can be speeded up and the working environment can be improved. it can.

It is the whole cutting machine perspective view provided with the dust collecting device of this embodiment. It is a (II) arrow line view in Drawing 1, and is a front view of a cutting machine. It is a (III) arrow line view in Drawing 2, and is a top view of a cutting machine. FIG. 4 is a side view of the cutting machine viewed from the rear side in the cutting direction in FIG. FIG. 3 is a side view of the cutting machine as viewed from the front side in the cutting direction in FIG. FIG. 3 is a cross-sectional view taken along the line (VI)-(VI) in FIG.

Next, an embodiment of the present invention will be described with reference to FIGS. 1-5 has shown the whole portable cutting machine 1 provided with the dust collector 20 which concerns on this embodiment. The configuration of the cutting machine 1 itself excluding the dust collector 20 is a conventionally known configuration, and since it does not require any particular change in the present embodiment, it will be briefly described.
In FIG. 1, the user is located behind the cutting machine 1. In the following description, the user is used as a reference in the front-rear, left-right, and up-down directions. Each direction is shown in the figure.
The cutting machine 1 includes a rectangular flat base 2 that is placed on the upper surface of the cutting material W, and a cutting machine body 3 supported on the upper surface of the base 2. The cutting machine body 3 includes an electric motor 4 as a drive source and a circular cutting blade 5 that rotates thereby. The periphery of the cutting blade 5 is covered with a main body case 6. The cutting blade 5 is attached to a spindle 12 supported on the main body case 6. The cutting blade 5 rotates counterclockwise as indicated by an arrow 6 a displayed on the main body case 6.
The electric motor 4 is attached to the back side (left side) of the main body case 6. A loop-shaped handle portion 7 is provided on the upper surface of the electric motor 4. As shown in FIG. 2, a trigger type switch lever 8 that is pulled by a user with a fingertip is disposed on the inner peripheral side of the handle portion 7. When the switch lever 8 is pulled, the electric motor 4 is activated and the cutting blade 5 rotates. In the vicinity of the front side of the switch lever 8 and on the right side surface on the front side of the handle portion 7, a push button type illumination switch 9 that is also turned on and off by the user with a fingertip is arranged. When the illumination switch 9 is turned on, the illumination tool 10 provided at the front portion of the main body case 6 is turned on. A light emitting diode (LED) is used for the illumination tool 10. When the illumination tool 10 is turned on, the vicinity of the gauge line 11 for the Sumi line alignment provided at the front end of the base 2 is illuminated brightly. By illuminating the vicinity of the gauge part 11 with the illumination tool 10, the positioning (sumi line alignment) work of the cutting material W in the dark place can be performed efficiently, and thereby accurate cutting work can be performed quickly. Can do.

A dust collection port 14 is provided at the front of the main body case 6. The dust collection port 14 is provided above a cutting site (cutting site C) for the cutting material W of the cutting blade 5. The dust generated at the cutting site C is blown upward in the main body case 6 by the rotation of the cutting blade 5 and flows into the dust collecting port 14. A dust collecting hose 15 is connected to the dust collecting port 14 via a nozzle 15 a, and further a dust collector (not shown) is connected via the dust collecting hose 15. Most of the dust generated at the cutting site C is collected by the dust collector. Dust that remains in the main body case 6 without being collected at the dust collecting port 14 is slight, but is blown backward in the main body case 6 by the rotation of the cutting blade 5. The dust collecting port 14 on the main body case 6 side corresponds to the upper dust collecting port described in the claims.
A lower portion of the cutting blade 5 is projected to the lower surface side through a window portion 2 a provided in the base 2. The lower part of the cutting blade 5 protruding toward the lower surface side of the base 2 is covered with a movable cover 13. The movable cover 13 is supported so as to be rotatable along the periphery of the cutting blade 5. In FIG. 2, when the movable cover 13 is rotated clockwise and opened, the cutting edge of the cutting blade 5 is exposed. On the other hand, the movable cover 13 is spring-biased in the closing direction. The movable cover 13 moves the cutting machine 1 to the front side in the cutting progress direction (right side in FIG. 2) while the front end of the movable cover 13 is in contact with the cutting side end surface of the cutting material W, and the cutting processing of the cutting material W proceeds. By doing so, it gradually opens against the spring biasing force. The dust collector 20 of the present embodiment has a configuration in which a dust receiver 21 is disposed below the movable cover 13.
The cutting machine body 3 is supported so as to be tiltable up and down with respect to the base 2 and can adjust the cutting depth of the cutting blade 5 with respect to the cutting material W (the amount of protrusion from the lower surface of the base 2). The cutting material W is also supported so as to be able to be tilted so that it can be tilted. Since this is a conventionally known technique, a description thereof will be omitted.

The dust collector 20 of this embodiment includes a dust receiver 21 and a support arm 22 that supports the dust receiver 21 with respect to the base 2. The dust receiver 21 has a generally open upper box shape having a bottom plate portion 21a, left and right side wall portions 21b and 21c, and a front wall portion 21d.
The support arm 22 is formed by bending a relatively narrow band steel plate into a U shape, and is fixed in a state of protruding from the front portion of the base 2 to the right side. The support arm 22 has its upper plate portion 22a inserted through an insertion hole 2b provided on the left side near the front of the base 2, and further has its tip 22b provided near the right side near the front of the base 2. It is fixed in a state perpendicular to the cutting progress direction (front-rear direction) by fixing with a screw-tightening type fixing lever 16. When the fixing lever 16 is rotated in the screw loosening direction, the fixed state of the distal end portion 22b is released, so that the upper plate portion 22a can be extracted to the left side, whereby the dust collector 20 can be removed from the base 2. it can.
The insertion hole 2b of the base 2 and the fixed lever 16 are provided for attaching a ruler for guiding the cutting machine 1 and consequently the cutting blade 5 in parallel to the end surface of the cutting material W at a constant interval. Thus, in this embodiment, the attachment type in which the dust receiver 21 can be attached to and detached from the cutting machine 1 by a simple operation using the insertion hole 2b for attaching the ruler and the fixing lever 16 (ruler attaching portion). It is characterized in that it is a dust collector 20.
A vertical plate portion 22c extends downward from the right end portion of the upper plate portion 22a of the support arm 22. The lower plate portion 22d extends to the right side from the lower end portion of the vertical plate portion 22c. The lower plate portion 22d extends in parallel to the upper plate portion 22a. The cutting material W enters between the upper plate portion 22a and the lower plate portion 22d. For this reason, the length dimension (space | interval between the upper board part 22a and the lower board part 22d) below the vertical board part 22c is set to a dimension large enough according to the plate | board thickness of the cutting material W assumed. ing.

Further, the dimension of the upper plate portion 22a projecting to the right side (the projecting dimension from the right end of the base 2), and the distance between the cutting blade 5 and the vertical plate section 22c is the cutting material to be cut off by the cutting process. It is set to a sufficiently large size corresponding to the expected width on the cut-off side.
A cylindrical cylindrical support member 24 is attached to the front end portion (right end portion) of the lower plate portion 22d via an L-shaped bracket 23. The cylindrical support member 24 cannot be displaced in the axial direction with respect to the bracket 23, but is supported rotatably around the axis.
As shown in FIG. 6, a flange portion 24 a is provided at the left end portion (right end portion in FIG. 6) of the cylindrical support member 24. A rotation support portion 24 b is provided between the flange portion 24 a and the bracket 23. A boss portion 21e provided integrally with the right side wall portion 21c of the dust receiver 21 is rotatably supported by the rotation support portion 24b. The boss portion 21e is sandwiched between the flange portion 24a and the bracket 23 and is supported so as not to be displaced in the axial direction.
The dust receiver 21 is supported to be tiltable up and down with respect to the support arm 22 by the boss portion 21e being rotatably supported by the rotation support portion 24b. Thus, the cylindrical support member 24 is rotatably supported by the bracket 23, and the boss portion 21 e of the dust receiver 21 is rotatably supported by the cylindrical support portion 24 b of the cylindrical support member 24. The dust receiver 21 is supported by the support arm 22 so as to be rotatable independently of each other about the same axis. As shown in FIG. 2, the position of the cylindrical support member 24 in the front-rear direction and the bracket so that the tilt center of the dust receiver 21 (the central axis of the boss portion 21 e and the rotation support portion 24 b) is located in front of the cutting portion C. 23 shapes are set.

The bracket 23 is sandwiched between the boss portion 21e and the retaining ring 25 and is coupled so as not to be relatively axially displaceable. A dust collecting hose 27 is connected to the right end of the cylindrical support member 24 via a nozzle 27a. A dust collecting hose 27 communicates with the inside of the dust receiver 21 through an inner peripheral hole of the cylindrical support member 24. The inner peripheral hole of the cylindrical support member 24 corresponds to the lower dust collection port described in the claims.
A dust collector (not shown) is connected to the dust collection hose 27. The dust in the dust receiver 21 is forcibly collected by the dust collector through the dust collecting hose 27 and the inner peripheral hole of the cylindrical support member 24.
As described above, the cylindrical support member 24 is fixed to the bracket 23 so as not to rotate. A dust receiver 21 is supported on the cylindrical support member 24 so as to be tiltable up and down. A tension spring 26 is interposed between the right side wall portion 21 c of the dust receiver 21 and the bracket 23. By this tension spring 26, the dust receiver 21 is urged in a direction to displace the tilting tip side upward. As shown in FIG. 2, a stopper block 28 is attached to the right side wall portion 21 c of the dust receiver 21. The stopper block 28 comes into contact with the bracket 23 and the dust receiver 21 is held at the upper receiving position. As shown in FIG. 2, the receiving position of the dust receiver 21 regulated by the stopper block 28 is such that the front wall portion 21d is substantially upright and the bottom plate portion 21a is inclined in a direction of gradually descending from the horizontal position to the rear side. Set to position.
The dust receiver 21 can be tilted in a direction (a direction indicated by a white arrow in FIG. 2, hereinafter referred to as a discharge direction) in which the rear side is displaced downward from the upper receiving position. The dust receiver 21 tilts in the discharge direction against the tension spring 26. Further, the dust receiver 21 tilts up and down around the axis of the boss 21e (the axis of the cylindrical support member 24).

As shown in FIG. 6, the dust receiver 21 is held below the cutting blade 5. For this reason, the left side wall part 21b is located on the left side with respect to the cutting surface S including the cutting blade 5, and the right side wall part 21c is located on the right side. Thus, the left and right side wall portions 21b and 21c are arranged at a sufficiently large interval, and the bottom plate portion 21a is arranged between the lower end portions thereof so that dust scattered below the cutting material W can be efficiently received.
Here, the rear end side of the cutting blade 5 (the rear crossing portion (the front crossing portion corresponds to the cutting site C) among the two crossing portions of the cutting material W and the cutting edge of the cutting blade 5) Then, although the cutting edge of the cutting blade 5 comes into contact with the cutting port of the cutting material W, dust is blown off to the lower surface side of the cutting material W although it is slight. Further, as described above, most of the dust blown upward from the cutting part C is collected in the dust collecting hose 15 through the dust collecting port 14 of the main body case 6, and the remaining dust that has not been separated and collected is also cut. After the blade 5 is rotated to blow rearward in the main body case 6, it is blown off to the lower surface side of the cutting material W. The dust blown off to the lower surface side of the cutting material W is blown downward from its tip portion through the inside of the movable cover 13 being opened or fully opened. When the cutting operation proceeds and the movable cover 13 is fully opened, the dust moves in the tangential direction indicated by the axis J in FIG. 2 from the rear crossing portion (the tip position of the movable cover 13) between the lower surface of the base 2 and the cutting blade 5. Along and blown down.
As described above, the lengths of the movable cover 13 in the front-rear direction are set so that the bottom plate portion 21a and the left and right side wall portions 21b and 21c of the dust receiver 21 are positioned below the front end portion. For this reason, even the dust blown off from the rear side of the cutting blade 5 to the lower surface side of the cutting material W is surely collected by the dust receiver 21.
As shown in FIG. 2, the upper portions of the left and right side wall portions 21b and 21c of the dust receiver 21 are each formed in an arc shape that curves in a downward direction to the rear side. Further, as described above, the dust receiver 21 is supported so as to be tiltable up and down around the axis of the cylindrical support member 24. For this reason, when the cut-off side, which is cut off from the cutting material main body side after the cutting process is completed, gets on the left and right side wall portions 21b and 21c, the dust receiver 21 resists the urging force of the tension spring 26 due to its weight. Tilts in the discharge direction indicated by the outlined white arrow. In particular, the upper portions of the left and right side wall portions 21b, 21c of the dust receiver 21 are formed in an arc shape in a direction of descending to the rear side. For this reason, the cut-off side of the cutting material that has landed on the left and right side wall portions 21b and 21c slides down smoothly on the left and right side wall portions 21b and 21c as the dust receiver 21 tilts in the discharge direction.
In this way, the cut-off side of the cutting material is surely slipped off from the dust receiver 21 and is not held in the state of being caught. Therefore, after the cutting process is completed, the cut-off side is separated from the cutting material main body side by a sufficient distance, and consequently movable. With respect to the returning operation of the cover 13 to the fully closed side, the cut-off side does not get in the way, and the movable cover 13 is smoothly returned to the fully closed position by the spring biasing force.

According to the dust collector 20 of the present embodiment configured as described above, dust generated or scattered on the lower surface side of the cutting material W can be collected by the dust receiver 21 almost directly under the cutting blade 5. Thus, the dust collecting function of the cutting machine 1 can be enhanced, and as a result, the working environment can be further improved. In particular, the dust collection function of the cutting machine 1 can be further enhanced by using it together with the dust collection function (the dust collection port 14, the dust collection hose 15, etc.) on the main body case 6 side.
Moreover, according to the dust collector 20 of this embodiment, since the dust receiver 21 is supported by the base 2 via the support arm 22, this can be handled as one with the cutting machine 1, Therefore, the convenience of handling the dust collector 20 can be improved as compared with the prior art.
Furthermore, if the fixing lever 16 of the base 2 is loosened, the upper plate portion 22a of the support arm 22 can be extracted from the insertion hole 2b, and the dust collecting device 20 can be detached from the cutting machine 1. From this, the dust collector 20 can be removed when not needed and the cutting machine 1 can be used alone, so that the handling ability of the cutting machine 1 as a single unit can be ensured.
Moreover, since the dust collector 20 of this embodiment is a structure attached using the ruler attachment part (the insertion hole 2b and the screw tightening type fixing lever 16) of the base 2, a special attachment site is newly set. The dust collector 20 can be realized at a lower cost as compared with the case where the dust collector 20 is performed, and the dust collector 20 can be retrofitted easily.
Moreover, according to the illustrated dust collector 20, the dust receiver 21 is provided so as to be able to tilt up and down, and the left and right side walls 21b and 21c are formed in a circular arc shape curved in a downward direction. Therefore, the cut-off side of the cutting material is surely slid down without staying on the dust receiver 21. For this reason, the cut-off side of the cutting material does not get in the way of the return operation of the movable cover 13 to the fully closed side, and the movable cover is smoothly and reliably returned to the fully closed position by the spring biasing force.
The dust receiver 21 is supported so as to be tiltable up and down with respect to the cylindrical support member 24 connected to the dust collecting hose 27. For this reason, the dust receiver 21 can be smoothly tilted up and down without twisting the dust collecting hose 27, so that the cut-off side of the cutting material can be surely slid down from the dust receiver 21, and the dust receiver 21 is pulled. The spring 26 can surely return to the receiving position, and the reliability of the operation of the dust receiver 21 can be ensured in this respect.

Various modifications can be made to the embodiment described above. For example, without changing the horizontal position of the dust receiver 21 with respect to the cutting blade 5 by changing the position of the upper plate portion 22a and the lower plate portion 22d or changing the length of the support arm 22, It can be set as the structure which can change the position of the horizontal direction of the vertical board part 22c. By making it possible to change the horizontal position of the vertical plate portion 22c, it becomes possible to easily cope with a change in the width dimension on the cut-off side of the cutting material while making the support arm 22 compact.
In addition, by making the length of the vertical plate portion 22c of the support arm 22 adjustable, the vertical position of the dust receiver 21 relative to the cutting blade 5 can be adjusted, and the thickness of the cutting material W can be adjusted. The distance between the upper plate portion 22a and the lower plate portion 22d can be changed according to the change.
The dust collection hose 15 connected to the main body case 6 side and the dust collection hose 27 connected to the dust receiver 21 side can be connected to each other and connected to one dust collector.
The connection of the dust collecting hose 27 and the dust collector to the dust receiver 21 may be omitted. In this case, the same operation and effect can be obtained with respect to the dust collection on the lower surface side of the cutting material by allowing the user to discharge the dust received by the dust receiver 21 at an appropriate timing.
Moreover, although the structure which attached using the ruler attachment part (insertion hole 2b and fixing lever 16) of the base 2 was illustrated, the special attachment means was newly installed in the base 2 or the other site | part of the cutting machine main body 3, and dust collection It is good also as a structure which attaches an apparatus.
Furthermore, although the configuration in which the dust collector 20 can be completely removed from the base 2 is illustrated, it may be configured such that the dust receiver can be retracted upward by adding a vertical rotation function to the support arm, for example.

W ... Cutting material C ... Cutting site S ... Cut surface J ... Dust blowing direction (tangential direction)
DESCRIPTION OF SYMBOLS 1 ... Cutting machine 2 ... Base, 2a ... Window part, 2b ... Insertion hole 3 ... Cutting machine main body 4 ... Electric motor 5 ... Cutting blade 6 ... Main body case, 6a ... Arrow (Indicating rotation direction of cutting blade)
7 ... Handle part 8 ... Switch lever 9 ... Light switch 10 ... Lighting tool 11 ... Sum line alignment gauge part 12 ... Spindle 13 ... Movable cover 14 ... Dust collector 15 ... Dust collector hose, 15a ... Nozzle 16 ... Fixed lever DESCRIPTION OF SYMBOLS 20 ... Dust collector 21 ... Dust receiver 21a ... Bottom plate part, 21b ... Left side wall part, 21c ... Right side wall part, 21d ... Front wall part 21e ... Boss part 22 ... Support arm 22a ... Upper plate part, 22b ... Tip part, 22c ... vertical plate portion, 22d ... lower plate portion 23 ... bracket 24 ... cylindrical support member, 24a ... flange portion, 24b ... rotation support portion 25 ... retaining ring 26 ... tension spring 27 ... dust collecting hose, 27a ... nozzle 28 ... Stopper block

Said subject is solved by the following invention.
The first invention includes a base placed on the cutting material, and a circular cutting blade supported on the upper surface of the base and protruding toward the lower surface side of the base. A dust collector provided in a cutting machine having a cutting machine body for performing a cutting process, and having a dust receiver supported by a base or a cutting machine body and held below the cutting blade. is there.
According to the first invention , since the dust receiver is supported by the base or the cutting machine body, it can be handled as an integral part of the cutting machine, thereby improving the convenience of handling the dust collector. Can be increased.
Further, since the dust receiver is held below the cutting blade, it is possible to receive cutting powder generated on both sides below the cutting blade, so that dust collection is efficiently performed on both the left and right sides of the cutting blade on the lower surface side of the cutting material. Will be able to.
A second invention is the dust collector according to the first invention, wherein the dust receiver is supported detachably with respect to the base or the cutting machine body.
According to the second invention , since it can be removed when not required, the convenience of handling of the cutting machine can be further enhanced.
A third invention is the dust collector according to the second invention, wherein the dust receiver is detachably supported by the base.
According to the third aspect of the invention , the dust receiver can be supported with respect to the part closer to the cutting material, and thus the support structure can be simplified.
According to a fourth invention, in the third invention, a ruler mounting portion for mounting a parallel ruler for guiding the cutting blade with respect to the cutting material is provided on the base, and this ruler mounting portion is used. It is a dust collector configured to support a dust receiver via an attached support arm.
According to the fourth invention , since the dust receiver can be supported using the existing ruler mounting portion, the dust collector can be realized at a lower cost than when a special mounting site is newly set. In addition, the dust collector can be easily retrofitted.
A fifth invention is the dust collector according to the second invention, wherein the dust receiver is supported so as to be tiltable up and down.
According to the fifth aspect of the present invention , it is possible to prevent the cut-off side cut off from the cutting material main body side by cutting from getting on the dust receiver. If the cut-off side of the cutting material gets on the dust catcher, it tends to stay in the vicinity of the cutting blade without leaving a sufficient distance from the cutting-material main body side (side not cut off). On the other hand, the periphery of the cutting blade protruding to the lower surface side of the base is usually covered with a movable cover that can be opened and closed in the circumferential direction. For this reason, when the cut-off side of the cut material gets on the dust receiver after the cutting process, the movable cover that is in the fully open state during the cutting process interferes with the cut-off side and the closing operation is hindered.
However, according to the fifth invention , the dust receiver tilts downward due to the weight of the cutting material on the cut-off side, so that the cut-off side does not stay on the dust receiver and slides smoothly. For this reason, the movable cover does not interfere with the cut-off side, and as a result, the movable cover is closed smoothly.
A sixth invention is the dust collector according to the fifth invention, wherein the dust receiver is provided with a dust collecting nozzle for connecting the dust collecting hose, and is supported to be tiltable up and down with respect to the dust collecting nozzle. .
According to the sixth invention , the dust collected in the dust receiver is collected (collected) by the dust collector by connecting, for example, a dust collector to the dust receiver via the dust collecting hose connected to the dust collecting nozzle. Can do.
The dust receiver is supported so as to be tiltable up and down with respect to the dust collection nozzle. For this reason, the dust receiver can be smoothly tilted up and down without twisting the dust collecting hose, so that the cut-off side of the cutting material does not interfere with the closing operation of the movable cover, so that the movable cover malfunctions. Can be prevented in advance.
7th invention is a cutting machine provided with the dust collector which concerns on any one invention of 1st-6th.
According to the seventh aspect of the present invention , the above-described effects can be obtained with respect to the dust collector for lower surface side dust collection, and thereby the added value of the cutting machine, such as the dust collection function and handleability, can be further enhanced.
8th invention is a cutting machine provided with the dust collector which concerns on 1st invention, Comprising: A dust receiver is provided with the lower dust collection opening for dust collection hose connection, and the cutting blade of the cutting blade is provided in the upper surface side of a base. The cutting machine includes a main body case and an upper dust collecting port for connecting a dust collecting hose to the main body case.
According to the eighth aspect, the cutting powder generated on both the upper surface side and the lower surface side of the cutting material can be collected, so that the cutting operation can be speeded up and the working environment can be improved.

A dust collection port 14 is provided at the front of the main body case 6. The dust collection port 14 is provided above a cutting site (cutting site C) for the cutting material W of the cutting blade 5. The dust generated at the cutting site C is blown upward in the main body case 6 by the rotation of the cutting blade 5 and flows into the dust collecting port 14. A dust collecting hose 15 is connected to the dust collecting port 14 via a nozzle 15 a, and further a dust collector (not shown) is connected via the dust collecting hose 15. Most of the dust generated at the cutting site C is collected by the dust collector. Dust that remains in the main body case 6 without being collected at the dust collecting port 14 is slight, but is blown backward in the main body case 6 by the rotation of the cutting blade 5. The dust collection port 14 on the main body case 6 side corresponds to the upper dust collection port described in the eighth invention .
A lower portion of the cutting blade 5 is projected to the lower surface side through a window portion 2 a provided in the base 2. The lower part of the cutting blade 5 protruding toward the lower surface side of the base 2 is covered with a movable cover 13. The movable cover 13 is supported so as to be rotatable along the periphery of the cutting blade 5. In FIG. 2, when the movable cover 13 is rotated clockwise and opened, the cutting edge of the cutting blade 5 is exposed. On the other hand, the movable cover 13 is spring-biased in the closing direction. The movable cover 13 moves the cutting machine 1 to the front side in the cutting progress direction (right side in FIG. 2) while the front end of the movable cover 13 is in contact with the cutting side end surface of the cutting material W, and the cutting processing of the cutting material W proceeds. By doing so, it gradually opens against the spring biasing force. The dust collector 20 of the present embodiment has a configuration in which a dust receiver 21 is disposed below the movable cover 13.
The cutting machine body 3 is supported so as to be tiltable up and down with respect to the base 2 and can adjust the cutting depth of the cutting blade 5 with respect to the cutting material W (the amount of protrusion from the lower surface of the base 2). The cutting material W is also supported so as to be able to be tilted so that it can be tilted. Since this is a conventionally known technique, a description thereof will be omitted.

The bracket 23 is sandwiched between the boss portion 21e and the retaining ring 25 and is coupled so as not to be relatively axially displaceable. A dust collecting hose 27 is connected to the right end of the cylindrical support member 24 via a nozzle 27a. A dust collecting hose 27 communicates with the inside of the dust receiver 21 through an inner peripheral hole of the cylindrical support member 24. The inner peripheral hole of the cylindrical support member 24 corresponds to the lower dust collection port described in the eighth invention .
A dust collector (not shown) is connected to the dust collection hose 27. The dust in the dust receiver 21 is forcibly collected by the dust collector through the dust collecting hose 27 and the inner peripheral hole of the cylindrical support member 24.
As described above, the cylindrical support member 24 is fixed to the bracket 23 so as not to rotate. A dust receiver 21 is supported on the cylindrical support member 24 so as to be tiltable up and down. A tension spring 26 is interposed between the right side wall portion 21 c of the dust receiver 21 and the bracket 23. By this tension spring 26, the dust receiver 21 is urged in a direction to displace the tilting tip side upward. As shown in FIG. 2, a stopper block 28 is attached to the right side wall portion 21 c of the dust receiver 21. The stopper block 28 comes into contact with the bracket 23 and the dust receiver 21 is held at the upper receiving position. As shown in FIG. 2, the receiving position of the dust receiver 21 regulated by the stopper block 28 is such that the front wall portion 21d is substantially upright and the bottom plate portion 21a is inclined in a direction of gradually descending from the horizontal position to the rear side. Set to position.
The dust receiver 21 can be tilted in a direction (a direction indicated by a white arrow in FIG. 2, hereinafter referred to as a discharge direction) in which the rear side is displaced downward from the upper receiving position. The dust receiver 21 tilts in the discharge direction against the tension spring 26. Further, the dust receiver 21 tilts up and down around the axis of the boss 21e (the axis of the cylindrical support member 24).

Claims (8)

A base mounted on the cutting material, and a circular cutting blade supported on the upper surface of the base and protruding to the lower surface side of the base, and being moved integrally with the base in the cutting progress direction, cutting the cutting material A dust collecting device equipped in a cutting machine having a cutting machine body,
A dust collector comprising a dust receiver supported by the base or the cutting machine main body and held below the cutting blade. The dust collector according to claim 1, wherein the dust receiver is detachably supported on the base or the cutting machine main body. 3. The dust collector according to claim 2, wherein the dust receiver is detachably supported by the base. The dust collector according to claim 3, wherein a ruler attaching portion for attaching a parallel ruler for guiding the cutting blade with respect to the cutting material is provided on the base, and the ruler attaching portion is provided. A dust collector configured to support the dust receiver via a support arm attached by use. 3. The dust collector according to claim 2, wherein the dust receiver is supported so as to be tiltable up and down. 6. The dust collector according to claim 5, wherein the dust receiver includes a dust collection nozzle for connecting a dust collection hose, and is supported so as to be tiltable up and down with respect to the dust collection nozzle. The cutting machine provided with the dust collector described in any one of Claims 1-6. 2. A cutting machine comprising the dust collecting device according to claim 1, wherein the dust receiver includes a lower dust collecting port for connecting a dust collecting hose, and the cutting blade is surrounded by a main body case on the upper surface side of the base. A cutting machine having an upper dust collecting port for connecting a dust collecting hose to the main body case.

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